US6076821A - Method and apparatus for feeding sheets - Google Patents

Method and apparatus for feeding sheets Download PDF

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Publication number
US6076821A
US6076821A US09/152,639 US15263998A US6076821A US 6076821 A US6076821 A US 6076821A US 15263998 A US15263998 A US 15263998A US 6076821 A US6076821 A US 6076821A
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US
United States
Prior art keywords
feed
sheet
time
pick signal
measurement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/152,639
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English (en)
Inventor
Kerry Leland Embry
Kevin Dean Schoedinger
Phillip Byron Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Citic Bank Corp Ltd Guangzhou Branch
Original Assignee
Lexmark International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lexmark International Inc filed Critical Lexmark International Inc
Priority to US09/152,639 priority Critical patent/US6076821A/en
Assigned to LEXMARK INTERNATIONAL, INC. reassignment LEXMARK INTERNATIONAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHOEDINGER, KEVIN D., WRIGHT, PHILLIP B., EMBRY, KERRY L.
Priority to EP99942344A priority patent/EP1113974B1/fr
Priority to AU55744/99A priority patent/AU5574499A/en
Priority to PCT/US1999/018942 priority patent/WO2000015527A1/fr
Priority to JP2000570073A priority patent/JP2002524370A/ja
Priority to DE69929068T priority patent/DE69929068T2/de
Publication of US6076821A publication Critical patent/US6076821A/en
Application granted granted Critical
Assigned to CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT reassignment CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT PATENT SECURITY AGREEMENT Assignors: LEXMARK INTERNATIONAL, INC.
Anticipated expiration legal-status Critical
Assigned to CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT reassignment CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT U.S. PATENT NUMBER PREVIOUSLY RECORDED AT REEL: 046989 FRAME: 0396. ASSIGNOR(S) HEREBY CONFIRMS THE PATENT SECURITY AGREEMENT. Assignors: LEXMARK INTERNATIONAL, INC.
Assigned to LEXMARK INTERNATIONAL, INC. reassignment LEXMARK INTERNATIONAL, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CHINA CITIC BANK CORPORATION LIMITED, GUANGZHOU BRANCH, AS COLLATERAL AGENT
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/18—Modifying or stopping actuation of separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42324—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from top of the pile
    • B65H2301/423245—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from top of the pile the pile lying on a stationary support, i.e. the separator moving according to the decreasing height of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side
    • B65H2405/1136—Front, i.e. portion adjacent to the feeding / delivering side inclined, i.e. forming an angle different from 90 with the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/51—Presence
    • B65H2511/514—Particular portion of element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B65H2513/51—Sequence of process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B65H2513/512—Starting; Stopping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/50—Timing
    • B65H2513/52—Age; Duration; Life time or chronology of event
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1311—Edges leading edge

Definitions

  • This invention relates to a method and apparatus for feeding sheets from a stack of sheets and, more particularly, to a method and apparatus for controlling when each sheet is fed from a stack of sheets.
  • a gap between the fed sheets should be as small as possible.
  • the time for the floating pick arm to settle increases as each sheet is removed from the stack of sheets. Accordingly, it is necessary that a minimum gap accommodate the settling characteristics of the floating pick arm without causing a paper jam when the floating pick arm feeds at the lowest point in the stack of sheets where the settling time is greatest.
  • the method and apparatus of the present invention satisfactorily solve the foregoing problem through selecting a gap sequence that can feed all of the sheets out of a tray even if the floating pick arm has not completely settled.
  • a total time is selected for each sheet equal to the sum of the time that it takes to feed the sheet to a predetermined point and the time for the desired gap. Using this total time, each sheet is picked at a selected pick delay time with the pick delay time and an expected feed time equalling the time for the length of the sheet to pass the predetermined point and the time for the desired gap.
  • the expected feed time of each fed sheet is referenced to the feed time of the prior sheet.
  • the measured feed time for each sheet is also compared with a maximum feed time, which is the average feed time for the last sheet in the stack of sheets and a small additional amount. If the measured feed time for the sheet being fed exceeds the maximum feed time, there is no change in the pick delay time for the next sheet until the measured feed time of a fed sheet does not exceed the maximum feed time.
  • the measured feed time of a sheet When the measured feed time of a sheet does not exceed the maximum feed time, the measured feed time of the sheet is utilized to control the pick delay time of the immediate next sheet. When the measured feed time of a sheet is less than its expected feed time, the measured feed time is employed directly to define the pick delay time. When the measured feed time of a sheet is not less than its expected feed time, then a limited amount is added to the expected feed time and that result is employed to define the pick delay time, which results in the next sheet being picked sooner.
  • the nominal amount of interpage gap is a machine design element.
  • the nominal pick delay amount depends on the length of paper preceding the sheet to be picked. Accordingly, these factors are determined during machine design and installed during manufacture of the machine. The length of paper during operation may be measured automatically from the setting of the paper tray or, alternately, input by the machine operator.
  • a feature of this invention is to provide a method and apparatus for feeding sheets from a stack of sheets with a relatively small gap between fed sheets.
  • Another feature of this invention is to provide a method and apparatus for feeding sheets from a stack of sheets in which the time for picking of each sheet is controlled by measuring the feed time of a sheet from pick to first encountering a sensor in the feed path without need to measure actual gaps or actual page lengths.
  • FIG. 1 is a top plan view of a sheet support tray of the present invention having a stack of sheets of media therein for advancement by an auto compensating pick mechanism.
  • FIG. 2 is a schematic view showing the relation between the floating pick arm of the auto compensating pick mechanism, a stack of sheets of media in a tray, a sensor, and a microprocessor.
  • FIG. 3 is a timing diagram showing the relation between fed sheets.
  • FIG. 4 is a flow chart of how the time of picking each sheet is determined.
  • a tray 10 used in a printer 11.
  • the tray 10 supports a plurality of sheets 12 of a media such as bond paper, for example, in a stack 14.
  • the sheets 12 may be other media such as card stock, labels, or transparencies, for example.
  • the tray 10 has a bottom wall 15 (see FIG. 2) supporting the stack 14 of the sheets 12 therein. Adjacent its front end 16 (see FIG. 1), the tray 10 has an inclined wall 17 integral with the bottom wall 15 (see FIG. 2) of the tray 10.
  • the wall 17 (see FIG. 1) is inclined at an obtuse angle to the bottom wall 15 (see FIG. 2) of the tray 10 and to the adjacent end of the stack 14 of the sheets 12.
  • the inclined or angled wall 17 (see FIG. 1) has ribs 18 against which each of the sheets 12 in the stack 14 is advanced into engagement.
  • the sheet 12 is advanced from the ribs 18 towards a processing station of the printer 11 at which printing occurs.
  • the bottom wall 15 extends between substantially parallel side walls 19 and 20 (see FIG. 1) of the tray 10.
  • Each of the sheets 12 is advanced from the stack 14 by an auto compensating pick mechanism 30 of the type described in the aforesaid Padget et al patent.
  • the auto compensating pick mechanism 30 includes a pair of feed rollers 31 and 32, which are driven from a motor 33 through a gear train (not shown).
  • the auto compensating pick mechanism 30 is more particularly shown and described in the published United Kingdom patent application of D. M. Gettelfinger et al, which is incorporated by reference herein, for "Sheet Separator", No. 2,312,667, published Nov. 5, 1997, and assigned to the same assignee as this application.
  • the motor 33 is alternately turned off and on by a microprocessor 35 (see FIG. 2) as each of the sheets 12 is advanced from the top of the stack 14 of the sheets 12.
  • FIG. 3 is intended to illustrate the system of operation of this invention.
  • the first two of the sheets 12 advanced from the stack 14 are identified in FIG. 3 as sheet n followed by sheet n+1.
  • the distance between leading edge 40 of the sheet n and leading edge 41 of the sheet n+1, nominally, is equal to page length (PL) and a desired gap (G) therebetween.
  • PL represents the time for the length of each sheet to be advanced past a predetermined point
  • Gap (G) represents the time for the desired gap between two adjacent sheets to move past a predetermined point.
  • the time between the leading edge 40 of the sheet n and the leading edge 41 of the sheet n+1 is defined in accordance with this invention by a pick delay time (PD) plus an expected feed time (FT exp ).
  • FT exp is a subtraction, suggested in FIG. 3 by the leftward direction of the arrow labeled FEED TIME expected.
  • the expected feed time (FT exp ) for each sheet is determined with reference to the measured feed time of the prior sheet. The first sheet is picked as soon as possible.
  • the measured feed time (FT m (n+1)) for the sheet n+1 in FIG. 3 is the time between when the microprocessor 35 (see FIG. 2) issues a pick signal to the motor 33 (see FIG. 1) of the auto compensating pick mechanism 30 until the leading edge 41 (see FIG. 3) of the sheet n+1 is sensed by a sensor 42.
  • the sensor 42 is located along a predetermined feed path 43 of each of the sheets 12 as it is advanced from the stack 14.
  • the sensor 42 is preferably the first sensor passed by each of the sheets 12 as it is advanced from the stack 14.
  • first sheet n (see FIG. 3) is the first sheet 12 (see FIG. 2) to be advanced from another of the stacks 14 after power is turned on or after a tray has been removed from its position and returned thereto
  • length of the paper preferably is sensed automatically by settings of tray 10.
  • the software in the microprocessor 35 provides a PL and gap values based on that length information to control the pick delay.
  • the sensor 42 senses when the first sheet n has the leading edge 40 pass the sensor 42.
  • This feed time which is from when the pick signal is issued to the motor 33 (see FIG. 1) until the leading edge 40 (see FIG. 3) of the first sheet n is sensed by the sensor 42, is measured as FT m (n).
  • a first sheet n (see FIG. 4) is picked immediately and the measured feed time FT m (n) is entered as FT exp (n+1). That entry, FT exp (n+1), is entered in DEFINE PD, action 45.
  • a safety factor (not shown in FIG. 3) may be added in order to avoid anomalies relating to the insertion of a tray and its effects on feeding the first sheet.
  • the safety factor is determined from preliminary tests and is zero for some cases, but in each case the safety factor is determined for the first sheet.
  • each of the following sheets 12 has its feed time measured and used to determine the magnitude of new revised expected feed time.
  • the sheet n+1 has the magnitude of its feed time FT m (n+1) measured as indicated in a block 47 (see FIG. 4).
  • the magnitude of FT m (n+1) is compared with the value of the maximum feed time FT max .
  • This value of the maximum feed time represents the feed time for a typical last sheet in the stack 14 (see FIG. 1) to reach sensor 42 reliably after being picked.
  • FT exp (n) is entered as FT exp (n+1) meaning no change is made from the previous feed time expected.
  • Action 49 enters FT exp (n+1) in DEFINE PD 45, and a pick signal is produced by an FT exp (n+2), which is the same as was FT exp (n+1) and therefore a smaller quantity than might have been entered. The smaller the quantity, the longer the delay.
  • FT m (n+1) is not greater than FT max , then a determination is made in a block 50 as to whether FT m (n+1) is less than FT exp (n+1). If FT m (n+1) is not less than FT exp (n+1), then that DEFINE PD 45 has a different value submitted for FT exp (n+2) as indicated in block 51.
  • the new value for FT exp (n+2) is FT exp (n+1) +x, where x is an additional predetermined increment factor, preferably in time constant increments of eleven milliseconds, with a maximum of two increments preferably used for each sheet.
  • x is two increments, which is twenty-two milliseconds.
  • FT m (n+1) represents less than twenty-two milliseconds with respect to FT exp (n+1)
  • x is one increment, which is eleven milliseconds.
  • FT m (n+1) was not greater than FT max and if FT m (n+1) is less than FT exp (n+1), then FT m (n+1) is entered as FT exp (n+2) as indicated in a block 52 and that FT exp (n+2) is entered in to DEFINE PD 45, which defines a generally longer delay.
  • FT exp (n+2) may increase or decrease from FT exp (n+1) or stay the same.
  • n+1 and n+2 will increase by one in FIG. 4 for each of the sheets 12 (see FIG. 1) being fed thereafter.
  • block 46 has no function, but, FT exp for the current sheet is set by blocks 49 and 52 in normal progress with n+1 becoming n+2 and n+2 becoming n+3, as is readily apparent.
  • the flow chart of FIG. 4 shows how software in the microprocessor 35 (see FIG. 2) is employed to possibly change the pick delay during advancement of each of the sheets 12 (see FIG. 1) from the stack 14. Therefore, the time interval between pick signals may stay the same, increase, or decrease.
  • the printer 11 When the printer 11 (see FIG. 1) has more trays than the tray 10 and there is a switch from picking the sheets 12 in the tray 10 to a second tray (not shown) since power for the printer 11 was turned on or the second tray was removed from its position and returned thereto, printer 11, being turned on, retains the pertinent information for each tray. Therefore, the first sheet picked from the second tray may not be the first sheet n of FIGS. 3 and 4.
  • second sheet 12 is the second sheet picked from the second tray since power for the printer 11 was turned on or the second tray was removed from its position and returned thereto
  • the expected feed time for the second sheet 12 from the second tray, FT exp (2nd sheet) is equal to the expected feed time for the first sheet 12 picked from the second tray and supplied by the microprocessor 35 (see FIG. 2).
  • the second sheet 12 would be the sheet n+1 of FIG. 4, and the remainder of FIG. 4 would be applicable.
  • the main motor of the printer 10 may have an encoder. Counting the total number of pulses from the encoder from when the pick signal is issued to pick the sheet 12 until the sensor 42 (see FIG. 3) senses the leading edge of the sheet 12 provides the distance traversed by the picked sheet.
  • the encoder pulses are counted and compared with prior and stored counts in the same manner as previously described in the timing arrangement. Accordingly, each of the timing arrangement and the encoder pulse counting arrangement provides measurements.
  • An advantage of this invention is that it allows a desired throughput of a printer with minimum printer speed requirements. Another advantage of this invention is to reduce the possibility of paper jams while maintaining a desired gap between sheets fed from a stack.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Controlling Sheets Or Webs (AREA)
US09/152,639 1998-09-14 1998-09-14 Method and apparatus for feeding sheets Expired - Lifetime US6076821A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US09/152,639 US6076821A (en) 1998-09-14 1998-09-14 Method and apparatus for feeding sheets
JP2000570073A JP2002524370A (ja) 1998-09-14 1999-08-20 シート供給を為す方法及び装置
AU55744/99A AU5574499A (en) 1998-09-14 1999-08-20 Method and apparatus for feeding sheets
PCT/US1999/018942 WO2000015527A1 (fr) 1998-09-14 1999-08-20 Technique d'alimentation en feuilles et appareil correspondant
EP99942344A EP1113974B1 (fr) 1998-09-14 1999-08-20 Technique d'alimentation en feuilles et appareil correspondant
DE69929068T DE69929068T2 (de) 1998-09-14 1999-08-20 Verfahren und vorrichtung zum zuführen von bögen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/152,639 US6076821A (en) 1998-09-14 1998-09-14 Method and apparatus for feeding sheets

Publications (1)

Publication Number Publication Date
US6076821A true US6076821A (en) 2000-06-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US09/152,639 Expired - Lifetime US6076821A (en) 1998-09-14 1998-09-14 Method and apparatus for feeding sheets

Country Status (6)

Country Link
US (1) US6076821A (fr)
EP (1) EP1113974B1 (fr)
JP (1) JP2002524370A (fr)
AU (1) AU5574499A (fr)
DE (1) DE69929068T2 (fr)
WO (1) WO2000015527A1 (fr)

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6203003B1 (en) * 1998-01-27 2001-03-20 Canon Kabushiki Kaisha Original carrying apparatus for scanning original being moved
US6378859B1 (en) * 1998-01-15 2002-04-30 Siemens Aktiengesellschaft Method for controlling a device used to remove packages from a pile
US6382618B1 (en) * 1999-05-25 2002-05-07 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus
US6519443B1 (en) 2001-10-02 2003-02-11 Lexmark International, Inc. Method for calculating a print medium pick time for an imaging apparatus that transports print media at variable speeds
US6533263B2 (en) * 2000-02-15 2003-03-18 Canon Kabushiki Kaisha Sheet conveying apparatus, and image forming apparatus and image reading apparatus having same
US6533264B1 (en) * 2001-02-09 2003-03-18 Unisys Corporation Constant space document feeder
US20030062671A1 (en) * 2001-09-28 2003-04-03 Toshiba Tec Kabushiki Kaisha Image forming apparatus and method for controlling the same
US6567620B2 (en) 2001-09-27 2003-05-20 Lexmark International, Inc. Image forming apparatus with variable gap size based on recording media supply level
US6578839B1 (en) * 1998-08-07 2003-06-17 Siemens Aktiengesellschaft Method and device for removing flat packages from a pile
US20030173735A1 (en) * 2002-03-12 2003-09-18 Naoki Hirako Apparatus and method for sheet transport control
US6651980B2 (en) * 2001-06-13 2003-11-25 Canon Kabushiki Kaisha Sheet conveying apparatus with correction device to compensate for sheet interval variation
US20040004319A1 (en) * 2002-05-23 2004-01-08 Hitoshi Hattori Automatic document feeder and image processing apparatus loaded with the same
US6685184B2 (en) * 2002-03-11 2004-02-03 Pitney Bowes Inc Transport method and system for controlling timing of mail pieces being processed by a mailing system
EP1386865A2 (fr) * 2002-07-29 2004-02-04 NexPress Solutions LLC Procédé et dispositif pour alimenter des feuilles dans une machine à imprimer
US6688590B2 (en) 2000-12-08 2004-02-10 Lexmark International, Inc. Dual tray printer with single drive shaft and dual media picks
US6702274B1 (en) * 1999-07-30 2004-03-09 Canon Kabushiki Kaisha Printing apparatus and printing method
US20040046314A1 (en) * 2002-09-09 2004-03-11 Fuji Xerox Co., Ltd Image forming apparatus
US20040056410A1 (en) * 1999-01-25 2004-03-25 Skadow Herman G. Sheet feeder apparatus and method with throughput control
US20040122181A1 (en) * 1993-07-15 2004-06-24 Great Lakes Chemical Italia S.R.L. Vulcanization accelerators
US20040245701A1 (en) * 2003-05-12 2004-12-09 Rhoads Christopher E. Pick mechanism and algorithm for an image forming apparatus
US20050074247A1 (en) * 2003-10-04 2005-04-07 Steven Soar Transmissive optical sensing of leading edges of media sheets advanced substantially adjacent to one another
US20050151313A1 (en) * 2004-01-14 2005-07-14 Oki Data Corporation Image forming apparatus
US20050179197A1 (en) * 2003-11-24 2005-08-18 Able Douglas A. Recovery from double media feed
US20050206067A1 (en) * 2004-03-18 2005-09-22 Cook William P Input tray and drive mechanism using a single motor for an image forming device
US20050253329A1 (en) * 2004-05-14 2005-11-17 Brother Kogyo Kabushiki Kaisha Apparatus and method for conveying sheet member
US20060096826A1 (en) * 2004-11-08 2006-05-11 Lexmark International, Inc. Clutch mechanism and method for moving media within an image forming apparatus
US20060145409A1 (en) * 2005-01-06 2006-07-06 Lexmark International, Inc. Method and apparatus for feeding sheets
US20060145413A1 (en) * 2004-12-31 2006-07-06 Samsung Electronics Co., Ltd Method and apparatus for sequentially feeding media
US7127184B2 (en) 2003-12-05 2006-10-24 Lexmark International, Inc. Method and device for clearing media jams from an image forming device
US20060239700A1 (en) * 2005-04-22 2006-10-26 Lexmark International, Inc Accordion jam detection of printed media
US20070001388A1 (en) * 2005-06-17 2007-01-04 Lexmark International, Inc. Media feeding management
DE102005038325A1 (de) * 2005-08-11 2007-02-15 Eastman Kodak Co. Verfahren zum Kontrollieren von Bögen in einer digitalen Druckmaschine
US20070058990A1 (en) * 2005-09-13 2007-03-15 Lexmark International, Inc. Packaging detection and removal for an image forming device
US20070063415A1 (en) * 2005-09-19 2007-03-22 Lexmark International, Inc. Method and device for correcting pick timing in an image forming device
US20080237969A1 (en) * 2007-03-29 2008-10-02 Kenji Totsuka Smart Pick Control Algorithm For An Image Forming Device
US20090152797A1 (en) * 2007-12-18 2009-06-18 Niko Jay Murrell Media Sheet Input Devices For Use In An Image Forming Apparatus
US20090166963A1 (en) * 2007-12-26 2009-07-02 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US20090166965A1 (en) * 2007-12-26 2009-07-02 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US20100148423A1 (en) * 2008-12-17 2010-06-17 Canon Kabushiki Kaisha Original-feeding device
US20110042882A1 (en) * 2006-09-14 2011-02-24 Kabushiki Kaisha Toshiba Sheet take-out apparatus, sheet processing apparatus, and sheet take-out method
US20130043647A1 (en) * 2011-08-17 2013-02-21 Ricoh Company, Ltd. Image forming apparatus
US20130195531A1 (en) * 2012-01-31 2013-08-01 Kyocera Document Solutions Inc. Image-forming apparatus and method for controlling image-forming apparatus
US20130207340A1 (en) * 2012-02-15 2013-08-15 Brother Kogyo Kabushiki Kaisha Sheet Feed Timing
US20140042693A1 (en) * 2012-08-07 2014-02-13 Canon Kabushiki Kaisha Method for controlling sheet conveyance in image forming apparatus
WO2014138193A1 (fr) * 2013-03-06 2014-09-12 Kodak Alaris Inc. Détection audio de blocage de support
US20150021846A1 (en) * 2013-07-18 2015-01-22 Samsung Electronics Co., Ltd. Device and method for controlling paper interval in paper feeder of image forming apparatus, and image forming apparatus including the device
US20150239695A1 (en) * 2014-02-26 2015-08-27 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US20150307302A1 (en) * 2014-04-25 2015-10-29 Kyocera Document Solutions Inc. Image forming apparatus
US10035673B2 (en) * 2015-06-19 2018-07-31 Canon Kabushiki Kaisha Image forming apparatus for forming image on conveyed sheet
WO2020263341A1 (fr) * 2019-06-24 2020-12-30 Hewlett-Packard Development Company, L.P. Commande d'entraînement de dispositif d'alimentation de support d'impression

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006117391A (ja) 2004-10-21 2006-05-11 Seiko Epson Corp 媒体給送装置の駆動方法、駆動制御プログラム及び記録装置
KR20190089403A (ko) 2018-01-22 2019-07-31 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. 픽업 시점을 조정하는 화상형성장치 및 화상형성방법

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734491A (en) * 1971-05-17 1973-05-22 Burroughs Corp Movable gap-control device
US4318540A (en) * 1978-09-14 1982-03-09 Burroughs Corporation Constant spacing document feeder
US4331328A (en) * 1980-06-30 1982-05-25 Burroughs Corporation Controller for a servo driven document feeder
US4451027A (en) * 1980-01-09 1984-05-29 Burroughs Corp. Constant spacing document feeder
US4645194A (en) * 1985-08-26 1987-02-24 Stobb Inc. Method and apparatus for creating a gap in a sheet stream
US4691912A (en) * 1984-07-03 1987-09-08 Licentia Patent-Verwaltungs-Gmbh Device for separating flat objects
US4893804A (en) * 1987-07-01 1990-01-16 Nec Corporation Apparatus for feeding sheet articles
US4986526A (en) * 1989-09-25 1991-01-22 Xerox Corporation Sheet registration calibration
US5056771A (en) * 1989-08-25 1991-10-15 Lexmark International, Inc. Apparatus for controlling interpage gaps in printers and method of interpage gap control
US5121914A (en) * 1989-10-27 1992-06-16 Hargreaves Edward W Apparatus for controlling the spacing, counting and batching of sheets fed by a machine
US5121915A (en) * 1989-11-20 1992-06-16 International Business Machines Corporation Document processor having improved throughput capabilities
US5192067A (en) * 1989-09-08 1993-03-09 Tokyo Electric Co., Ltd. Paper feed for page printer
US5193797A (en) * 1990-10-05 1993-03-16 Seikosha Co., Ltd. Paper feeding system and picking system used therefor
US5295677A (en) * 1992-08-28 1994-03-22 Videojet Systems International, Inc. Speed control for document handling system
US5326184A (en) * 1992-10-26 1994-07-05 Hewlett-Packard Company Apparatus and method for picking paper from a stack
US5415387A (en) * 1992-04-30 1995-05-16 Ricoh Company, Ltd. Sheet feed device for a selectable print speed image forming device having a time delayed pick-up roller
US5418604A (en) * 1992-09-28 1995-05-23 Fujitsu Limited Image forming method and apparatus with automatic skew control
US5423527A (en) * 1993-11-05 1995-06-13 Unisys Corporation Document transport with gap adjust
US5461468A (en) * 1994-10-31 1995-10-24 Xerox Corporation Document handler interdocument gap control system
US5494271A (en) * 1994-06-10 1996-02-27 Umax Data Systems Inc. Transmission system for a document feeder
US5495326A (en) * 1991-04-26 1996-02-27 Sanyo Electric Co., Ltd. Sheet feeding control for an image forming apparatus
US5527026A (en) * 1995-03-17 1996-06-18 Lexmark International, Inc. Auto compensating paper feeder
US5575466A (en) * 1994-11-21 1996-11-19 Unisys Corporation Document transport with variable pinch-roll force for gap adjust
US5622364A (en) * 1996-03-27 1997-04-22 Lexmark International, Inc. Apparatus and method of determining a media level in a supply tray
US5626334A (en) * 1994-05-13 1997-05-06 Nec Corporation Device and method for feeding cut sheets of paper in a one-by-one picking up manner without jamming
GB2312667A (en) * 1996-05-02 1997-11-05 Lexmark Int Inc Sheet separator

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3734491A (en) * 1971-05-17 1973-05-22 Burroughs Corp Movable gap-control device
US4318540A (en) * 1978-09-14 1982-03-09 Burroughs Corporation Constant spacing document feeder
US4451027A (en) * 1980-01-09 1984-05-29 Burroughs Corp. Constant spacing document feeder
US4331328A (en) * 1980-06-30 1982-05-25 Burroughs Corporation Controller for a servo driven document feeder
US4691912A (en) * 1984-07-03 1987-09-08 Licentia Patent-Verwaltungs-Gmbh Device for separating flat objects
US4645194A (en) * 1985-08-26 1987-02-24 Stobb Inc. Method and apparatus for creating a gap in a sheet stream
US4893804A (en) * 1987-07-01 1990-01-16 Nec Corporation Apparatus for feeding sheet articles
US5056771A (en) * 1989-08-25 1991-10-15 Lexmark International, Inc. Apparatus for controlling interpage gaps in printers and method of interpage gap control
US5192067A (en) * 1989-09-08 1993-03-09 Tokyo Electric Co., Ltd. Paper feed for page printer
US4986526A (en) * 1989-09-25 1991-01-22 Xerox Corporation Sheet registration calibration
US5121914A (en) * 1989-10-27 1992-06-16 Hargreaves Edward W Apparatus for controlling the spacing, counting and batching of sheets fed by a machine
US5121915A (en) * 1989-11-20 1992-06-16 International Business Machines Corporation Document processor having improved throughput capabilities
US5193797A (en) * 1990-10-05 1993-03-16 Seikosha Co., Ltd. Paper feeding system and picking system used therefor
US5495326A (en) * 1991-04-26 1996-02-27 Sanyo Electric Co., Ltd. Sheet feeding control for an image forming apparatus
US5415387A (en) * 1992-04-30 1995-05-16 Ricoh Company, Ltd. Sheet feed device for a selectable print speed image forming device having a time delayed pick-up roller
US5295677A (en) * 1992-08-28 1994-03-22 Videojet Systems International, Inc. Speed control for document handling system
US5418604A (en) * 1992-09-28 1995-05-23 Fujitsu Limited Image forming method and apparatus with automatic skew control
US5326184A (en) * 1992-10-26 1994-07-05 Hewlett-Packard Company Apparatus and method for picking paper from a stack
US5423527A (en) * 1993-11-05 1995-06-13 Unisys Corporation Document transport with gap adjust
US5626334A (en) * 1994-05-13 1997-05-06 Nec Corporation Device and method for feeding cut sheets of paper in a one-by-one picking up manner without jamming
US5494271A (en) * 1994-06-10 1996-02-27 Umax Data Systems Inc. Transmission system for a document feeder
US5461468A (en) * 1994-10-31 1995-10-24 Xerox Corporation Document handler interdocument gap control system
US5575466A (en) * 1994-11-21 1996-11-19 Unisys Corporation Document transport with variable pinch-roll force for gap adjust
US5527026A (en) * 1995-03-17 1996-06-18 Lexmark International, Inc. Auto compensating paper feeder
US5622364A (en) * 1996-03-27 1997-04-22 Lexmark International, Inc. Apparatus and method of determining a media level in a supply tray
GB2312667A (en) * 1996-05-02 1997-11-05 Lexmark Int Inc Sheet separator

Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040122181A1 (en) * 1993-07-15 2004-06-24 Great Lakes Chemical Italia S.R.L. Vulcanization accelerators
US6378859B1 (en) * 1998-01-15 2002-04-30 Siemens Aktiengesellschaft Method for controlling a device used to remove packages from a pile
US6203003B1 (en) * 1998-01-27 2001-03-20 Canon Kabushiki Kaisha Original carrying apparatus for scanning original being moved
US6578839B1 (en) * 1998-08-07 2003-06-17 Siemens Aktiengesellschaft Method and device for removing flat packages from a pile
US7168700B2 (en) * 1999-01-25 2007-01-30 Bowe Bell + Howell Company Sheet feeder apparatus and method with throughput control
US20040056410A1 (en) * 1999-01-25 2004-03-25 Skadow Herman G. Sheet feeder apparatus and method with throughput control
US6382618B1 (en) * 1999-05-25 2002-05-07 Canon Kabushiki Kaisha Sheet conveying apparatus and image forming apparatus
US6978992B2 (en) 1999-07-30 2005-12-27 Canon Kabushiki Kaisha Printing apparatus and printing method
US20040119224A1 (en) * 1999-07-30 2004-06-24 Canon Kabushiki Kaisha Printing apparatus and printing method
US6702274B1 (en) * 1999-07-30 2004-03-09 Canon Kabushiki Kaisha Printing apparatus and printing method
US6533263B2 (en) * 2000-02-15 2003-03-18 Canon Kabushiki Kaisha Sheet conveying apparatus, and image forming apparatus and image reading apparatus having same
US6688590B2 (en) 2000-12-08 2004-02-10 Lexmark International, Inc. Dual tray printer with single drive shaft and dual media picks
US6533264B1 (en) * 2001-02-09 2003-03-18 Unisys Corporation Constant space document feeder
US6651980B2 (en) * 2001-06-13 2003-11-25 Canon Kabushiki Kaisha Sheet conveying apparatus with correction device to compensate for sheet interval variation
US6567620B2 (en) 2001-09-27 2003-05-20 Lexmark International, Inc. Image forming apparatus with variable gap size based on recording media supply level
US20030062671A1 (en) * 2001-09-28 2003-04-03 Toshiba Tec Kabushiki Kaisha Image forming apparatus and method for controlling the same
US6519443B1 (en) 2001-10-02 2003-02-11 Lexmark International, Inc. Method for calculating a print medium pick time for an imaging apparatus that transports print media at variable speeds
US6685184B2 (en) * 2002-03-11 2004-02-03 Pitney Bowes Inc Transport method and system for controlling timing of mail pieces being processed by a mailing system
US20030173735A1 (en) * 2002-03-12 2003-09-18 Naoki Hirako Apparatus and method for sheet transport control
US6758471B2 (en) * 2002-03-12 2004-07-06 Fuji Xerox Co., Ltd. Apparatus and method for sheet transport control
US7004464B2 (en) * 2002-05-23 2006-02-28 Ricoh Company, Ltd. Automatic document feeder and image processing apparatus loaded with the same
US20040004319A1 (en) * 2002-05-23 2004-01-08 Hitoshi Hattori Automatic document feeder and image processing apparatus loaded with the same
EP1386865A3 (fr) * 2002-07-29 2005-07-20 Eastman Kodak Company Procédé et dispositif pour alimenter des feuilles dans une machine à imprimer
EP1386865A2 (fr) * 2002-07-29 2004-02-04 NexPress Solutions LLC Procédé et dispositif pour alimenter des feuilles dans une machine à imprimer
US7293768B2 (en) * 2002-09-09 2007-11-13 Fuji Xerox Co., Ltd. Image forming apparatus
US20040046314A1 (en) * 2002-09-09 2004-03-11 Fuji Xerox Co., Ltd Image forming apparatus
US7377508B2 (en) 2003-05-12 2008-05-27 Lexmark International, Inc. Pick mechanism and algorithm for an image forming apparatus
US20040245701A1 (en) * 2003-05-12 2004-12-09 Rhoads Christopher E. Pick mechanism and algorithm for an image forming apparatus
US20050074247A1 (en) * 2003-10-04 2005-04-07 Steven Soar Transmissive optical sensing of leading edges of media sheets advanced substantially adjacent to one another
US6952536B2 (en) * 2003-10-04 2005-10-04 Hewlett-Packard Development Company, L.P. Transmissive optical sensing of leading edges of media sheets advanced substantially adjacent to one another
US20050179197A1 (en) * 2003-11-24 2005-08-18 Able Douglas A. Recovery from double media feed
US6978997B2 (en) 2003-11-24 2005-12-27 Lexmark International, Inc. Recovery from double media feed
US7127184B2 (en) 2003-12-05 2006-10-24 Lexmark International, Inc. Method and device for clearing media jams from an image forming device
US20050151313A1 (en) * 2004-01-14 2005-07-14 Oki Data Corporation Image forming apparatus
US7296794B2 (en) * 2004-01-14 2007-11-20 Oki Data Corporation Image forming apparatus
US20050206067A1 (en) * 2004-03-18 2005-09-22 Cook William P Input tray and drive mechanism using a single motor for an image forming device
US7451975B2 (en) 2004-03-18 2008-11-18 Lexmark International, Inc. Input tray and drive mechanism using a single motor for an image forming device
US20050253329A1 (en) * 2004-05-14 2005-11-17 Brother Kogyo Kabushiki Kaisha Apparatus and method for conveying sheet member
US7523932B2 (en) * 2004-05-14 2009-04-28 Brother Kogyo Kabushiki Kaisha Apparatus and method for conveying sheet member
US20060096826A1 (en) * 2004-11-08 2006-05-11 Lexmark International, Inc. Clutch mechanism and method for moving media within an image forming apparatus
US7182192B2 (en) 2004-11-08 2007-02-27 Lexmark International, Inc. Clutch mechanism and method for moving media within an image forming apparatus
US20060145413A1 (en) * 2004-12-31 2006-07-06 Samsung Electronics Co., Ltd Method and apparatus for sequentially feeding media
US20060145409A1 (en) * 2005-01-06 2006-07-06 Lexmark International, Inc. Method and apparatus for feeding sheets
US7275740B2 (en) 2005-01-06 2007-10-02 Lexmark International, Inc. Method and apparatus for feeding sheets
US20060239700A1 (en) * 2005-04-22 2006-10-26 Lexmark International, Inc Accordion jam detection of printed media
US20070001388A1 (en) * 2005-06-17 2007-01-04 Lexmark International, Inc. Media feeding management
DE102005038325A1 (de) * 2005-08-11 2007-02-15 Eastman Kodak Co. Verfahren zum Kontrollieren von Bögen in einer digitalen Druckmaschine
US7976009B2 (en) 2005-08-11 2011-07-12 Eastman Kodak Company Method and device of controlling sheets in a digital printing machine
US20100156041A1 (en) * 2005-08-11 2010-06-24 Eastman Kodak Company Method and device of controlling sheets in a digital printing machine
US7454145B2 (en) 2005-09-13 2008-11-18 Lexmark International, Inc Packaging detection and removal for an image forming device
US20070058990A1 (en) * 2005-09-13 2007-03-15 Lexmark International, Inc. Packaging detection and removal for an image forming device
US20070063415A1 (en) * 2005-09-19 2007-03-22 Lexmark International, Inc. Method and device for correcting pick timing in an image forming device
US7396009B2 (en) * 2005-09-19 2008-07-08 Lexmark International Inc. Method and device for correcting pick timing in an image forming device
US20110042882A1 (en) * 2006-09-14 2011-02-24 Kabushiki Kaisha Toshiba Sheet take-out apparatus, sheet processing apparatus, and sheet take-out method
US8561984B2 (en) * 2006-09-14 2013-10-22 Kabushiki Kaisha Toshiba Sheet take-out apparatus, sheet processing apparatus, and sheet take-out method
US20080237969A1 (en) * 2007-03-29 2008-10-02 Kenji Totsuka Smart Pick Control Algorithm For An Image Forming Device
US7699305B2 (en) 2007-03-29 2010-04-20 Lexmark International, Inc. Smart pick control algorithm for an image forming device
US20090152797A1 (en) * 2007-12-18 2009-06-18 Niko Jay Murrell Media Sheet Input Devices For Use In An Image Forming Apparatus
US7648133B2 (en) 2007-12-18 2010-01-19 Lexmark International, Inc. Media sheet input devices for use in an image forming apparatus
US8047529B2 (en) * 2007-12-26 2011-11-01 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US20090166963A1 (en) * 2007-12-26 2009-07-02 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US20090166965A1 (en) * 2007-12-26 2009-07-02 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US7883083B2 (en) * 2007-12-26 2011-02-08 Seiko Epson Corporation Method of feeding medium in recording apparatus, and recording apparatus
US20100148423A1 (en) * 2008-12-17 2010-06-17 Canon Kabushiki Kaisha Original-feeding device
US8011651B2 (en) * 2008-12-17 2011-09-06 Canon Kabushiki Kaisha Original-feeding device
US20130043647A1 (en) * 2011-08-17 2013-02-21 Ricoh Company, Ltd. Image forming apparatus
US8827259B2 (en) * 2011-08-17 2014-09-09 Ricoh Company, Ltd. Image forming apparatus
US20130195531A1 (en) * 2012-01-31 2013-08-01 Kyocera Document Solutions Inc. Image-forming apparatus and method for controlling image-forming apparatus
US8757617B2 (en) * 2012-02-15 2014-06-24 Brother Kogyo Kabushiki Kaisha Sheet feed timing
US20130207340A1 (en) * 2012-02-15 2013-08-15 Brother Kogyo Kabushiki Kaisha Sheet Feed Timing
US8955841B2 (en) * 2012-08-07 2015-02-17 Canon Kabushiki Kaisha Method for controlling sheet conveyance in image forming apparatus
US20140042693A1 (en) * 2012-08-07 2014-02-13 Canon Kabushiki Kaisha Method for controlling sheet conveyance in image forming apparatus
US9260261B2 (en) 2013-03-06 2016-02-16 Kodak Alaris Inc. Audio detection of medium jam
WO2014138193A1 (fr) * 2013-03-06 2014-09-12 Kodak Alaris Inc. Détection audio de blocage de support
US20150021846A1 (en) * 2013-07-18 2015-01-22 Samsung Electronics Co., Ltd. Device and method for controlling paper interval in paper feeder of image forming apparatus, and image forming apparatus including the device
US9878863B2 (en) * 2013-07-18 2018-01-30 S-Printing Solution Co., Ltd. Device and method for controlling paper interval in paper feeder of image forming apparatus, and image forming apparatus including the device
US20150239695A1 (en) * 2014-02-26 2015-08-27 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US9359159B2 (en) * 2014-02-26 2016-06-07 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
US9701502B2 (en) * 2014-04-25 2017-07-11 Kyocera Document Solutions Inc. Image forming apparatus
US20150307302A1 (en) * 2014-04-25 2015-10-29 Kyocera Document Solutions Inc. Image forming apparatus
US10035673B2 (en) * 2015-06-19 2018-07-31 Canon Kabushiki Kaisha Image forming apparatus for forming image on conveyed sheet
WO2020263341A1 (fr) * 2019-06-24 2020-12-30 Hewlett-Packard Development Company, L.P. Commande d'entraînement de dispositif d'alimentation de support d'impression

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DE69929068D1 (de) 2006-01-26
WO2000015527A1 (fr) 2000-03-23
AU5574499A (en) 2000-04-03
EP1113974A4 (fr) 2004-05-26
EP1113974B1 (fr) 2005-12-21
DE69929068T2 (de) 2006-08-24
EP1113974A1 (fr) 2001-07-11

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